/Engine/Source/Editor/UnrealEd/Classes/Editor/UnrealEdEngine.h
Updates the volume actor visibility for all viewports based on the passed in volume class
void UpdateVolumeActorVisibility ( [UClass](API\Runtime\CoreUObject\UObject\UClass) * InVolumeActorClass, [FLevelEditorViewportClient](API\Editor\UnrealEd\FLevelEditorViewportClient) * InViewport )